Spoke Lengths!

[doctor-46]

I have a KHE geisha 36 hole freecoaster hub and a KHE big O rim (made by alienation, same as their runaway rim).
I need spokes to build it up, but I am unsure of what length I should be using, I have tried using a few online calculators but I am still uncertain!
The diameter between the center of the spoke holes on the hubs is 58mm, overall hub width is 108mm....
Can anyone with a bit more experience help me out???

[oldtired]

the pijin spoke calculator has a couple of KHE freecoasters  and runaway rim listed , 

https://www.pijin.co.uk/spokecalc.html

[doctor-46]

I have had a look at that one, think I have worked it out but was hoping someone who actually knows what they are doing could back me up! 😀
Don't want to go ordering spokes and get the totally wrong size!